浅层地下水水化学特征及适宜性评价

Chemical characteristics of shallow groundwater and suitability evaluation

为查明沽源县浅层地下水水化学特征及水质状况,选取52组样品进行水化学组成分析.运用Piper三线图,确定研究区地下水水化学类型.在此基础上采用了不同的评价方法对该研究区水质现状进行评价.结果表明:该区浅层地下水化学类型主要以HCO_(3)-Ca型为主;地下水质量综合评价结果显示研究区内18组地下水化学组分较高,适用于农业用水,也可适当处理后作为生活饮用水;16组地下水化学组分高,质量标准评价为Ⅴ类水,不宜作为生活饮用水饮用.为了提高水资源利用效率,对其进行灌溉用水适宜性评价.通过对16组地下水作为灌溉用水评价,评价结果是DX-39处水质较差,不宜或不太适用于灌溉.研究成果可为该区浅层地下水资源的合理开发和利用提供科学依据,对保障灌溉当地农作物安全有着重要意义.

In order to find out the hydrochemical characteristics and water quality of shallow groundwater in Guyuan,52 groups of groundwater samples were selected for hydrochemical composition analysis.Using Piper trilinear diagram,the hydrochemical types of groundwater in the study area were determined.On this basis,different evaluation methods were used to evaluate the current situation of water quality in the study area.The results show that the mainly chemical types of shallow groundwater in this area is HCO_(3)-Ca.The results of comprehensive evaluation of groundwater quality show that the chemical composition of 18 groups groundwater are higher in the study area,which is suitable for agricultural and some industrial water,and can be used as drinking water after proper treatment.The chemical components of 16 groups groundwater are high,and the quality of groundwater is evaluated asⅴwater,which is not suitable for drinking water.In order to improve the utilization efficiency of water resources,the suitability of irrigation water is evaluated.The water quality of 16 groups of shallow groundwater was evaluated as irrigation water.The evaluation result is that the water quality of DX-39 is poor.It is not suitable for irrigation.The research results can provide scientific basis for the rational development and utilization of shallow groundwater resources in this area.This is great significance to ensure the safety of local crops in irrigation.